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CVE-2026-24850

ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices

概要

ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto ml-dsa crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be strictly increasing. The current implementation uses a non-strict monotonic check (<= instead of <), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict < comparison to <=, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.

出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

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